27280980 has 36 divisors (see below), whose sum is σ = 82752852. Its totient is φ = 7274880.

The previous prime is 27280973. The next prime is 27280987. The reversal of 27280980 is 8908272.

It is an interprime number because it is at equal distance from previous prime (27280973) and next prime (27280987).

It can be written as a sum of positive squares in 2 ways, for example, as 16744464 + 10536516 = 4092^2 + 3246^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27280987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75601 + ... + 75960.

Almost surely, 2^27280980 is an apocalyptic number.

27280980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27280980 is an abundant number, since it is smaller than the sum of its proper divisors (55471872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27280980 is a wasteful number, since it uses less digits than its factorization.

27280980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151576 (or 151571 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 27280980 is about 5223.1197573864. The cubic root of 27280980 is about 301.0370774368.

The spelling of 27280980 in words is "twenty-seven million, two hundred eighty thousand, nine hundred eighty".